RFR: 8144214 Some log messages will be discarded when VM is bootstrapping.

[Hamlin Li]

Hi all,

Would you please help to review for 
http://cr.openjdk.java.net/~mli/8144214/webrev.00/, which fixes bug 
https://bugs.openjdk.java.net/browse/JDK-8144214.

Thank you
-Hamlin